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Google圖書搜尋
Gumbotil as a Potential Source of Rotary Drilling Mud, Bonding Clay and Bleaching Clay
John Everts Lamar
其他書名
A Progress Report on the Study of Illinois Surficial Clays
出版
State Geolgical Survey
, 1938
URL
http://books.google.com.hk/books?id=alFgPQAACAAJ&hl=&source=gbs_api